CN104349969B - The manufacture method of damper housing structural body - Google Patents

The manufacture method of damper housing structural body Download PDF

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Publication number
CN104349969B
CN104349969B CN201380028487.8A CN201380028487A CN104349969B CN 104349969 B CN104349969 B CN 104349969B CN 201380028487 A CN201380028487 A CN 201380028487A CN 104349969 B CN104349969 B CN 104349969B
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China
Prior art keywords
damper
pad
welding
structural body
shell
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CN201380028487.8A
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Chinese (zh)
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CN104349969A (en
Inventor
大冈久康
铃木敦
后东光繁
大塚启太
根笹大知
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/088—Details of structures as upper supports for springs or dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/10—Spot welding; Stitch welding
    • B23K11/11—Spot welding
    • B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/082—Engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Abstract

A kind of damper housing structural body of bond strength that can increase preventing weight and guarantee damper shell and damper pedestal while operation quantity increases is provided.In damper housing structural body (1), the upper limb of damper shell (2) is engaged by spot welding with damper pedestal (3), damper shell (2) under vertical view in the U-shaped towards vehicle outside with opening, and the corner portion between front side wall (22) and madial wall (21) has planar portions (24), planar portions (24) has the multiple pads (the 51st, 52) along the arrangement of vehicle fore-and-aft direction, and the welding surplus each other of adjacent pad (the 51st, 52) is overlapping.

Description

The manufacture method of damper housing structural body
Technical field
The present invention relates to the manufacture method of the damper housing structural body in vehicle and damper housing structural body.
Background technology
The draft hitch (suspension) of vehicle supports via the damper pedestal becoming damper upper surface of outer cover In damper shell, this damper shell is located at the both sides of engine room and overlooks u-shaped shape (with reference to patent document 1).To Load when this damper pedestal and damper shell input vehicle travel, when particularly travelling on crankcase ventilaton, input is very Big load, therefore it is required that suitable bond strength.
Damper pedestal is engaged in the upper limb of damper shell by spot welding.Known vehicle travel when load concentration in Overlook corner, the front portion of the upper limb of the damper shell of u-shaped shape, but such position cannot be carried out solder joints, it is difficult to Guarantee bond strength by spot welding.Therefore, by based on the reinforcement of miscellaneous part, the increase of thickness of slab, the shape of damper pedestal Design etc. guarantee required intensity (patent document the 2nd, the 3rd, 4 reference).
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2006-56489 publication
Patent document 2: Japanese Unexamined Patent Publication 2009-292226 publication
Patent document 3: Japanese Unexamined Patent Publication 2004-276789 publication
Patent document 4: Japanese Unexamined Patent Publication 2007-284008 publication
Content of the invention
Invention problem to be solved
But, at patent document the 2nd, the 3rd, in the technology described in 4, exist with based on the reinforcement of miscellaneous part, thickness of slab Increase, the design of the shape of damper pedestal etc. and cause weight to increase, cause operation due to the reinforcement based on miscellaneous part The problems such as quantity increase.
The present invention creates in view of the foregoing, and its problem is to provide a kind of damper housing structural body and damping The manufacture method of device housing structural body, can prevent weight increase and operation quantity increase while guarantee damper shell with The bond strength of damper pedestal.
For solving the method for problem
In order to solve above-mentioned problem, the present invention is a kind of damper housing structural body, possesses: damper shell, and it is used for The damper of the draft hitch of storage vehicle；With damper pedestal, it is located at the top of above-mentioned damper shell, for above-mentioned damping Device is fixed, and this damper housing structural body is characterised by, the upper limb of above-mentioned damper shell passes through with above-mentioned damper pedestal Spot welding and engage, above-mentioned damper shell under vertical view in the U-shaped towards vehicle outside with opening, and at front wall portion And the corner portion between inner wall part has planar portions, above-mentioned planar portions has the multiple pads along the arrangement of vehicle fore-and-aft direction, The welding surplus each other of adjacent above-mentioned multiple pad is overlapping.
In addition, in order to solve above-mentioned problem, the present invention is a kind of damper housing structural body, possesses: damper shell, its For receiving the damper of the draft hitch of vehicle；With damper pedestal, it is located at the top of above-mentioned damper shell, supplies above-mentioned Damper is fixed, and this damper housing structural body is characterised by, the upper limb of above-mentioned damper shell and above-mentioned damper pedestal Engaged by spot welding, above-mentioned damper shell under vertical view in the U-shaped towards vehicle outside with opening, and front Corner portion between wall portion and inner wall part has planar portions, and above-mentioned planar portions has the multiple welding along the arrangement of vehicle fore-and-aft direction Point, the interval of two adjacent above-mentioned pads is shorter than the external diameter of welding surplus.
According to such composition, the planar portions in the corner portion between the madial wall and front side wall of damper shell is with narrow Interval carry out multiple spot welding, therefore, it is possible to set multiple pad at the small being difficult to set pad in the past, thus Can guarantee to bear the intensity travelling load in damper shell.In addition, can thinning damper by raising intensity The thickness of slab of shell such that it is able to seek lighting and the reduction cost of vehicle body.In addition, by the suitably distribution energy of multiple pads What enough minimizings were overall gets number ready such that it is able to play the effect reducing cost and reducing flow chart quantity.In addition, pass through front side Crest line between crest line between wall and planar portions and madial wall and planar portions, can suitably disperse from below to damper The traveling load of shell input such that it is able to avoid load concentration.
Being configured to, an above-mentioned pad is soldered by being also energized to the above-mentioned pad being soldered.
According to such composition, due to sequentially form and and non-concurrent form multiple pad, therefore to a welding When point welds, can be energized to other pads 51 established and engage at multiple pads, therefore, it is possible to The small being in the past difficult to set pad sets multiple pad, can guarantee to bear traveling and carry in damper shell The intensity of lotus.In addition, the thickness of slab being capable of thinning damper shell 2 by improving intensity such that it is able to seek the lightweight of vehicle body Change and reduce cost.Overall get number in addition, can be reduced by the suitably distribution of multiple pads ready such that it is able to play fall Low cost and the effect reducing flow chart quantity.
Expecting current value when welding an above-mentioned pad, the above-mentioned pad that comparison has been soldered welds Current value when connecing is high.
According to such composition, when a pad is welded, carry out with comparison other pads established The high value of current value during welding is welded, therefore, it is possible to set multiple at the small being difficult to set pad in the past Pad, can guarantee to bear the intensity travelling load in damper shell.In addition, can be thinning by raising intensity The thickness of slab of damper shell such that it is able to seek lighting and the reduction cost of vehicle body.In addition, by the suitable distribution of pad Can reduce and overall get number ready such that it is able to play the effect reducing cost and reducing flow chart quantity.
Being configured to, the width of above-mentioned planar portions, the external diameter sum of the welding surplus with above-mentioned multiple pads is substantially Identical.
According to such composition, owing to the width of planar portions is roughly the same with the external diameter sum of welding surplus, therefore, it is possible to Damper shell guarantees bear the intensity travelling load.In addition, can thinning damper shell by raising intensity Thickness of slab such that it is able to seek vehicle body lighting and reduction cost.In addition, can be subtracted by the suitably distribution of multiple pads Few overall gets number ready such that it is able to play the effect reducing cost and reducing flow chart quantity.
In addition, in order to solve above-mentioned problem, the present invention is the manufacture method of a kind of damper housing structural body, this damper Housing structural body possesses: damper shell, and it is for receiving the damper of the draft hitch of vehicle；With damper pedestal, it sets In the top of above-mentioned damper shell, fix for above-mentioned damper, in this damper housing structural body, by spot welding by above-mentioned The upper limb of damper shell engages with above-mentioned damper pedestal, and the feature of the manufacture method of above-mentioned damper housing structural body exists In, above-mentioned damper shell under vertical view in the U-shaped towards vehicle outside with opening, and at front wall portion and inner wall part Between corner portion there is planar portions, at above-mentioned planar portions, carry out spot welding as follows: along the arrangement of vehicle fore-and-aft direction Multiple pads at, two overlapping or adjacent above-mentioned pads of adjacent above-mentioned multiple pad welding surplus each other Interval than welding surplus external diameter short.
Being configured to, an above-mentioned pad is soldered by being also energized to the above-mentioned pad being soldered.
It is configured to, current value when an above-mentioned pad is welded, the above-mentioned welding that comparison has been soldered Current value when point welds is high.
Invention effect
In accordance with the invention it is possible to guarantee damper shell and damping while preventing weight from increasing and operation quantity increases The bond strength of device pedestal.
Brief description
Fig. 1 is the stereogram representing the vehicle with the damper housing structural body involved by embodiments of the present invention.
Fig. 2 is the amplification stereogram representing damper housing structural body.
Fig. 3 is the exploded perspective view representing damper shell and damper pedestal.
Fig. 4 is the figure of the joint that damper shell and damper pedestal are described, (a) is to represent damper shell and damper The stereogram of pedestal, (b) is the enlarged drawing of the A1 part representing (a), and (c) is to represent bowing of damper shell and damper pedestal View, (d) is the enlarged drawing of the A2 part representing (c), and (e) is that the A3 of (d) is to regarding sectional view.
Fig. 5 is the figure of the welding method for the pad in illustrated planar portion, and (a) is the state representing the energising initial stage Figure, (b) is the figure of the state after shunting expands, and (c) is the figure of the state after representing shunting minimizing.
Detailed description of the invention
With regard to embodiments of the present invention, so that the damper housing structural body of the present invention is applicable to front part structure of vehicle It as a example by situation, is described in detail with reference to Fig. 1～Fig. 5.In explanation, the same reference to same key element mark, and omit The explanation repeating.In addition, in the case of direction, carry out up and down based on left and right before and after observing from the driver of vehicle Explanation.Additionally, overall width direction is synonymous with left and right directions.
Fig. 1 is the vehicle from right diagonally forward top view with damper housing structural body involved by present embodiment The stereogram of front part structure of vehicle.As it is shown in figure 1, vehicle V is so-called automobile, possess: house the power units such as engine Power carries room P；Become the car room R of the passenger space of member；With wheelhouse portions WH housing front-wheel W.Involved by present embodiment Front part structure of vehicle 1 be to have to carry, at this power, damper shell 2 and the subtracting of damper pedestal 3 that the left and right of room P is arranged The construction of shake device housing structural body 1 periphery.
Front part structure of vehicle 1 mainly possesses: the damper shell 2 of pair of right and left；It is located at the damping on damper shell 2 top Device pedestal 3；Power is carried the instrument board 4 that room P and car room R separates；The left and right carrying room P at power is prolonged along vehicle fore-and-aft direction Stretch a pair upper member 5 of setting；And the reinforcing plate 6 between the damper shell 2 about being erected at.In addition, vehicle V possesses The gear mud of lower longeron the 10th, the pair of right and left of the front pillar of front side vehicle frame the 7th, the pair of right and left of pair of right and left the 8th, front dividing plate the 9th, pair of right and left Plate 11 (Fig. 2 reference) etc..
Upper member 5 is the frame parts constructing along the extended hollow section of vehicle fore-and-aft direction.Upper member 5 is with more court Forward side and be located lower section mode bend.The leading section of upper member 5 branches into upper and lower two parts and links with front dividing plate 9. In addition, the rearward end of upper member 5 links with front pillar 8.In addition, be provided with mud guard 11 outside the vehicle V of upper member 5, pass through spiral shell Bolt (not shown) and interconnected.
Instrument board 4 is the steel that power carries the tabular that room P and car room R separates.Instrument board 4 is by the instrument of downside The instrument panel upper portion part 4b both parts of plate lower component 4a and upside is constituted.Dashboard lower part 4a is set up in the front pillar of left and right Between 8.Between the rearward end of the upper member 5 that instrument panel upper portion part 4b is set up in left and right.
Front side vehicle frame 7 be than upper member 5 position more on the lower along the extended hollow section of vehicle fore-and-aft direction The frame parts of construction.The leading section of front side vehicle frame 7 links with front dividing plate 9, the rearward end of front side vehicle frame 7 and dashboard lower part The lower end side of 4a links.
Front pillar 8 is the left and right end portions of left and right end portions and bearing meter plate lower component 4a supporting front windshield WS The frame parts of hollow section construction.The bottom of front pillar 8 is extended along vehicle fore-and-aft direction with the left and right end portions at car room R The leading section of a pair lower longeron 10 link.
Fig. 2 is the amplification stereogram of the damper housing structural body representing right side.Damper shell 2 and damper pedestal 3 It is symmetrical construction, therefore in the following description, the damper shell 2 on the right side of explanation and damper pedestal 3, omit a left side The explanation of side.In fig. 2, × mark represents the position being engaged by spot welding.
As in figure 2 it is shown, damper shell 2 is the steel of the damper D (with reference to Fig. 3) housing draft hitch, constitute Power carries the sidewall of the left and right of room P.Damper shell 2 have madial wall (inner wall part) the 21st, front side wall (front wall portion) 22 and after Sidewall 23 (with reference to Fig. 3), in substantially U-shaped under vertical view.Upper weld at damper shell 2 is fixed with damper pedestal 3.The bottom 21a of madial wall 21 engages with front side vehicle frame 7.Car outboard end at front side wall 22 and rear wall 23 is formed convex Edge (only illustrates the flange 22a of front side wall 22), engages with the car medial surface 5a of upper member 5.In addition, front side wall 22 and rear wall The bottom (only illustrating the bottom 22b of front side wall 22) of 23 is shaped generally as arc-shaped, and gets over closer to madial wall 21 It is positioned at lower section.
It is integrally formed with wheelhouse portions forepiece 25 at the bottom 22b of front side wall 22.Wheelhouse portions forepiece 25 is substantially round Arcuation ground bends, and the end outside the car of wheelhouse portions forepiece 25 engages with upper member 5, the end inside car and front side vehicle frame 7 engage.In addition, be integrally formed with damper housing extension 26 at the bottom 23b of rear wall 23.Damper shell stretches out Substantially arc-shaped ground, portion 26 bends, and the end outside the car of damper housing extension 26 engages with damper pedestal 3, in car The end of side engages with front side vehicle frame 7.In addition, the rearward end of damper housing extension 26 engages with dashboard lower part 4a. It is made up of the upper surface of wheelhouse portions WH this wheelhouse portions forepiece 25 and damper housing extension 26.
In the present invention, corner portion between madial wall 21 and front side wall 22 for the damper shell 2 has planar portions 24. Such planar portions 24 is to be transfused to the position of very big load when the traveling of vehicle V, is relative to madial wall 21 and front side wall 22 seat surfaces being formed obliquely respectively.
Fig. 3 is the exploded perspective view representing damper shell and damper pedestal.As it is shown on figure 3, damper pedestal 3 is solid Constitute the top of damper shell 2 due to the top of damper shell 2 and in dish-shaped steel.Damper pedestal 3 with Damper shell 2 is separately constructed, and damper pedestal 3 is configured to thicker than damper shell 2.Damper pedestal 3 has: for subtracting The damper pedestal upper wall 31 that shake device D installs；With the damper pedestal sidewall 32 being fixed on damper shell 2.
Further, since damper pedestal 3 and damper shell 2 are separately formed, travel load etc. therefore, it is possible to only increase The thickness of slab of the damper pedestal 3 of big load input, prevents the increase of the thickness of slab of damper shell 2, thus suppresses weight to increase.
Central portion at damper pedestal upper wall 31 is formed with opening portion 31a, and this opening portion 31a is located at damping for interting The cylindric protuberance Da of device D head.Subtract in addition, damper pedestal upper wall 31 has three around the 31a of this opening portion Shake device fixed part 31b.
As it is shown on figure 3, damper fixed part 31b is the through hole for the interspersed bolt portion Db being located at damper D head. Three damper fixed part 31b configure in the way of the imaginary line linking them in order becomes equilateral triangle.
Damper pedestal sidewall 32 is the position being engaged by the upper limb of spot welding and damper shell 21, has: madial wall (inner wall part) 32a, front side wall (front wall portion) 32b and rear wall 32c；And the corner portion between madial wall 32a and front side wall 32b Planar portions 32d being formed, the shape that the vehicle V lateral surface in the upper limb with damper shell 21 for this damper pedestal sidewall 32 overlaps Shape.
Fig. 4 is the figure of the joint that damper shell and damper pedestal are described, (a) is to represent damper shell and damper The stereogram of pedestal, (b) is the enlarged drawing of the A1 part representing (a), and (c) is to represent bowing of damper shell and damper pedestal View, (d) is the enlarged drawing of the A2 part representing (c), and (e) is that the A3 of (d) is to regarding sectional view.
As shown in (c)～(e) of Fig. 4, the upper limb of damper shell 2 and the damper pedestal sidewall 32 of damper pedestal 3 Engaged by spot welding in the state of overlapping.As shown in (a) of Fig. 4, exist based on the junction (X mark) of spot welding It has been respectively present multiple on madial wall the 21st, front side wall 22 and rear wall 23, and, planar portions 24 there is also multiple (at this Embodiment is at two).
It as shown in (b) of Fig. 4, is formed at the junction based on the spot welding i.e. pad of planar portions 24 the 51st, 52 along vehicle V Fore-and-aft direction arrangement ground configuration.The pad 51 first engaging is by welding center (getting ready) 51a and weld part (nugget (nugget)) 51b is constituted, and this weld part 51b actual being soldered centered on welding center 51a engages, from welding gun 61 (with reference to Fig. 5) Observe diametrically R1Circular position, existence welding surplus 51c around pad 51, this welding surplus 51c is in weldering Meet the circular plate shape centered on the 51a of center, a diameter of R2(R2＞ R1), the external diameter i.e. when welding gun 61 is observed be R2, internal diameter is R1。 The pad 52 of rear joint by welding center (getting ready) 52a and centered on welding center 52a actual be soldered that engage, A diameter of R when welding gun 61 is observed1Weld part (nugget) 52b constitute, around pad 52 existence welding surplus 52c, This welding surplus 52c is in the circular plate shape centered on welding center 52a, a diameter of R2(R2＞ R1), i.e. when welding gun 61 is observed External diameter be R2, internal diameter is R1.The external diameter R of such weld part (nugget) 51b, 52b1With more big then this external diameter R of thickness of slab1Bigger Mode change, but as specified in JIS, setting thickness of slab as tAWhen, this external diameter R1It is usually 4 √ tA.In addition, welding Surplus 51c, the external diameter R of 52c2It is usually set as 2 times of external diameter (electrode diameter) of welding gun 61.
In the present embodiment, the 51st, adjacent pad 52 joins in the way of respective welding surplus 51c, 52c are overlapping Put.In other words, adjacent pad the 51st, 52 welding center 51a, 52a between interval d than welding surplus 51c, outside 52c Footpath i.e. diameter R2Short, the 51st, adjacent pad 52 configures in the way of meeting following formula.
R1＜ d ＜ R2
That is, the interval d between adjacent welding center 51a, 52a do not overlap each other with weld part (nugget) 51b, 52b and And the mode that welding surplus 51c, 52c overlap each other sets.
In addition, the width w of planar portions 24 (equal with the width of planar portions 32d) expectation with multiple pads the 51st, 52 weldering Meet the external diameter i.e. diameter R of surplus 51c, 52c2Sum is roughly the same.
w≒2R2
If additionally, can ensure that the bond strength based on welding, then the width w of planar portions 24 also can be than multiple pads 51st, 52 welding surplus 51c, 52c external diameter sum big.
In the present embodiment, the 51st, two pads 52 configure in the way of clipping crest line L1 (with reference to (d) of Fig. 4), its In crest line in the case of be corner portion shape in curved surface between conventional madial wall 21 and front side wall 22 for this crest line L1.Change speech It, the 51st, two pads 52 configure in the way of the width central authorities clipping planar portions 24.
It follows that with reference to Fig. 5, the pad in planar portions 24 the 51st, 52 welding method centered on the present invention is described The manufacture method of the damper housing structural body involved by embodiment.Fig. 5 is for the pad in illustrated planar portion The figure of welding method, (a) is the figure of the state representing the energising initial stage, and (b) is the figure of the state after representing shunting expansion, and (c) is The figure of the state after shunting minimizing.
Here, Joule heat Q during welding is expressed from the next.
Q=0.24 I2·r·t
I: electric current, r: resistance, t: conduction time
Sequentially form pad the 51st, 52 in the case of, i.e. formed form pad 52 after pad 51 in the case of, When forming pad 52, produce shunting to pad 51, thus the electric current flowing to pad 52 reduces.Therefore, in order to compensate The electric current of shunt volume, needs to increase the electric current I in Joule heat formula or prolongation t conduction time.But, although also can lead to Cross prolongation t conduction time increasing the nugget size (energising diameter) of pad 52, but impact can be produced on the activity duration, therefore In the present embodiment, the value by regulating electric current I realizes suitable nugget size.
First, as shown in (a) of Fig. 5, in the state of first bond pads 51 defines weld part 51b, with folder The mode of the welding center 52a pad 52 configures a Butt welding gun the 61st, 61, carries out the energising for spot welding.Here, pad The current value for spot welding in 52 is set to higher than the current value for spot welding in the pad 51 being soldered.This is Consider to occur to pad 51 measure of the situation of shunting when the joint of pad 52.
That is, as shown in (a) of Fig. 5, at the energising initial stage of pad 52, except the resistance r via damper shell 2 side1And The resistance r of damper pedestal 3 side2And formed outside the electric current of weld part 52b, also there is the resistance r via damper shell 2 side3 And the resistance r of damper pedestal 3 side4The shunting of weld part 51b side.
Then, as shown in (b) of Fig. 5, when weld part 52b due to energising adstante febre, resistance r1、r2Increase, at weld part The current value of flowing in 52b reduces, and the current value of shunting increases.
It follows that as shown in (c) of Fig. 5, when weld part 52b expands due to energising, resistance r1、r2Reduce, in welding The current value of flowing in portion 52b increases, and the current value of shunting reduces.
The current value during joint of pad 52 depends on the material of damper shell 2 and damper pedestal 3, thickness of slab etc., But it is set to for example than the high 500～1500A of current value during the joint of pad 51.Electricity when than the joint of pad 51 In the case that the amount that flow valuve increases is less than 500A, it is possible to cause becoming big to the shunting of pad 51, thus welding cannot be guaranteed The suitable nugget size of point 52.In addition, than the joint of pad 51 when the situation more than 1500A for the amount that increases of current value Under, it is possible to produce a large amount of splashing at the energising initial stage and cause resistance r1、r2Decline, thus the suitable of pad 52 cannot be guaranteed Nugget size R1。
The damper housing structural body that embodiments of the present invention relate to is at the madial wall 21 of damper shell 2 and front side wall Carry out multiple spot welding with narrow interval, therefore, it is possible to be difficult to set welding in the past in the planar portions 24 in the corner portion between 22 The small of point sets pad the 51st, 52 such that it is able to guarantee to bear the intensity travelling load in damper shell 2. In addition, the thickness of slab being capable of thinning damper shell 2 by improving intensity such that it is able to seek the lighting of vehicle body and reduce into This.In addition, by multiple pads the 51st, 52 suitably distribution can reduce and overall get number ready such that it is able to play and reduce into Basis and the effect reducing flow chart quantity.In addition, by the crest line L between front side wall 22 and planar portions 242And madial wall 21 And the crest line L between planar portions 243, can suitably disperse from below to the traveling load of damper shell 2 input, it is thus possible to Enough avoid load concentration.
In addition, the damper housing structural body involved by embodiments of the present invention sequentially form and and non-concurrent formed many Individual pad the 51st, 52, therefore when welding a pad 52, can be energized to other pads 51 established And engage at multiple pads, therefore, it is possible to set pad the 51st, at the small being difficult to set pad in the past 52, can guarantee to bear the intensity travelling load in damper shell 2.In addition, can thinning be subtracted by improving intensity The thickness of slab of shake device shell 2 such that it is able to seek lighting and the reduction cost of vehicle body.In addition, by multiple pads the 51st, 52 Suitably distribution can reduce and overall gets number ready such that it is able to play the effect reducing cost and reducing flow chart quantity.
In addition, a pad 52 is being welded by the damper housing structural body involved by embodiments of the present invention When, the high value of current value when welding with comparison other pads 51 established welds, therefore, it is possible in the past The small being difficult to set pad sets pad the 51st, 52, can guarantee to bear traveling load in damper shell 2 Intensity.In addition, the thickness of slab being capable of thinning damper shell 2 by improving intensity such that it is able to seek the lighting of vehicle body And reduction cost.In addition, by multiple pads the 51st, 52 suitably distribution can reduce and overall get number ready such that it is able to send out Wave the effect reducing cost and reducing flow chart quantity.
In addition, the width of the planar portions 24 of damper housing structural body involved by embodiments of the present invention is remaining with welding The external diameter sum of amount is roughly the same, therefore, it is possible to guarantee to bear the intensity travelling load in damper shell 2.In addition, it is logical Cross the thickness of slab improving intensity and being capable of thinning damper shell 2 such that it is able to seek lighting and the reduction cost of vehicle body.Separately Outward, by multiple pads the 51st, 52 suitably distribution can reduce and overall get number ready such that it is able to play and reduce cost and subtract The effect of few flow chart quantity.
This concludes the description of embodiments of the present invention, but the present invention is not limited to above-mentioned embodiment, without departing from this Can suitably change in the range of the purport invented.For example, the pad in planar portions 24 also can be more than three.At n The natural number of more than 3 (n be) pad in planar portions 24 along the arrangement of vehicle V fore-and-aft direction configure in the case of, planar portions The width w expectation of 24 meets following formula.
w≒n·R2
Description of reference numerals
1 front part structure of vehicle
2 damper shells (damper housing structural body)
3 damper pedestals (damper housing structural body)
21 madial walls (inner wall part)
22 front side walls (front wall portion)
24 planar portions
51st, 52 pad
51c, 52c weld surplus
D damper

Claims (2)

1. a manufacture method for damper housing structural body, this damper housing structural body possesses: damper shell, it is located at Power at the anterior storage power unit of vehicle carries room, and for receiving the damper of draft hitch；With damper pedestal, It is located at the top of described damper shell, fixes for described damper, in this damper housing structural body, and will by spot welding The upper limb of described damper shell engages with described damper pedestal,
The manufacture method of described damper housing structural body is characterised by,
Described damper shell under vertical view in the U-shaped towards vehicle outside with opening, and at front wall portion and inwall Corner portion between portion has the planar portions for being formed along multiple pad of vehicle fore-and-aft direction arrangement,
The manufacture method of described damper housing structural body includes:
First step, is in first described pad in described planar portions and carries out spot welding；With
Second step, is in second later described pad in described planar portions and carries out spot welding,
In described second step, carry out spot welding as follows at second later described pad: second later Described pad overlapping with the adjacent described pad being soldered welding surplus each other or second later described Pad is shorter than the external diameter of welding surplus with the interval of the adjacent described pad being soldered, and also to adjacent by The described pad energising of welding,
Current value when welding described pad in described second step is set to ratio in described first step Current value when welding described pad is high,
The width of described planar portions, the external diameter sum of the described welding surplus with the plurality of pad is roughly the same.
2. the manufacture method of damper housing structural body according to claim 1, it is characterised in that
Current value when welding described pad in described second step is set to from the energising initial stage ratio in institute State current value when in first step welding described pad high.
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BR112014029463A2 (en) 2017-06-27
CN104349969A (en) 2015-02-11
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EP2857289A4 (en) 2016-04-20
US20150166117A1 (en) 2015-06-18
WO2013180025A1 (en) 2013-12-05
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US9481398B2 (en) 2016-11-01
JP5976105B2 (en) 2016-08-23

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